There's also the whole issue with comparing between individuals. You know how there are some memes along the lines of "one kick into the gonads is ten times as hurtful as giving birth" or other stuff? Utter rubbish. Up to now nobody can compare how feelings are affecting the brains of different people. Yes, we can measure brain waves (not in all situations though) but people with similar brain reactions tell completely different subjective stories about how they feel. Brains react differently to similar stimuli (like a knock on the fingers). One person will feel worse when hit on the finger than on the toe, the other is the other way round. There is just no objective measurement of feelings at all that correlates to what people themselves think.
In this game that means that even though Julia gets 90 points, she still might be the one least enamoured with MC.